Season of Light

Lightflow consists of a 3D rendering server and a client interface written in C++. There's also a Python wrapper to the client interface so you can script it using Python. Documentation for the Python API is included with the modules. The documentation does not cover graphical programming in general, but there is plenty of annotated source code for you to play around with if you are just starting out.

While Lightflow is available for both Linux and Windows, it only works with Python 1.5.x. It won't work with Python 2.0. Rats! I hope Pantaleoni will get around to updating the library soon.